186 University of California Publications in Zoology (Vou. 
9:05 A.M. Water-bottle series from 25, 10, 3 fathoms. 
9:12 a.m. Water-bottle series from 45, 35, 6 fathoms. 
9:20 a.M. Water-sample series from 20, 9, 5 fathoms. 
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A.M. Surface nets in; surface water-sample taken. 
A.M. Accurate position determined; lat. 32° 23/2 N; long. 
117° 1826 W. 
Owing to a smooth sea and the fact that a minimum of acci- 
dents occurred, the regular plan as given above was completed 
from an hour to an hour and a half earlier than usual. The 
remaining time from 9:30 a.m. to 11:25 a.m. was employed in 
testing V. K. Ekman’s theory of oceanic currents as follows: 
9:50 A.M. Arrive at latitude 32° 23'2 N; longtitude 117° 17/4 W. 
9:50 a.m. Water-bottle series from 55, 35, 15 feet. 
9:55 A.M. Water-bottle series from 65, 40, 25 feet. 
9:55 A.M. Surface water-sample taken. 
10:15 a.m. Arrive at latitude 32° 23/2 N; longitude 117° 16:2 W. 
10:15 a.m. Water-bottle series from 55, 35, 15 feet. 
10:20 a.m. Water-bottle series from 65, 40, 25 feet. 
10:20 a.m. Surface water-sample taken. 
10:40 a.m. Arrive at latitude 32° 232 N; longitude 117° 15'5 W. 
10:40 a.m. Water-bottle series from 55, 35, 15 feet. 
10:45 a.m. Water-bottle series from 65, 40, 25 feet. 
10:45 a.m. Surface water-sample taken. 
11:00 A.M. Arrive at latitude 32° 23:2 N; longitude 117° 14/9 W. 
11:00 a.m. Water-bottle series from 55, 35, 15 feet. 
11:05 a.m. Water-bottle series from 65, 40, 25 feet. 
11:05 a.m. Surface water-sample taken. 
11:20 a.m. Arrive at latitude 32° 2371 N; longitude 117° 1471 W. 
11:20 a.m. Water-bottle series from 55, 35, 15 feet. 
11:25 a.m. Water-bottle series from 65, 40, 25 feet. 
11:25 a.m. Surface water-sample taken. 
12:25 p.m. Arrive at anchorage on South Coronado Island. 
The following record of weather and light conditions were 
made while the regular collecting was being done: 
2:23 to 4:00 aw. Too dark for photometer reading. Ocean smooth, weather 
foggy and dismal. Barometer remained at 30 through- 
out entire day. Photometer readings for the day were 
as follows: 
4:28 aM. 13 Hood open. 
4:30 aM. 12 Hood open. 
4:45 am. 5 Hood open. 
4:58 a.M. 39 Hood covered. Fog lifting, partly cloudy. 
5:00 a.M. 35 Hood covered for remainder of observations. 
5:02 aM. 32 5:32 aM. 10.0 6:06 a.m. 10.0 
5:04 a.m. 29 5:34 a.m. 15.0 6:08 am. 9.5 
